Manufacturer Name: MB-1. Government Designation: LR-79-7. Designer: Rocketdyne. Developed in: 1955. Application: . Used on stages: Thor DM-19. Used on launch vehicles: Delta, Thor, Thor Able, Thor Agena A, Thor Agena B, Thor Agena D, Thor Burner. Propellants: Lox/KeroseneThrust(vac): 77,367 kgf. Thrust(vac): 758.70 kN. Isp: 282 sec. Isp (sea level): 248 sec. Burn time: 165 sec. Mass Engine: 643 kg. Diameter: 2.4 m. Chambers: 1. Chamber Pressure: 41.00 bar. Area Ratio: 8.00. Thrust to Weight Ratio: 120.32. Country: USA. Status: Out of Production. First Flight: 1958. Last Flight: 1980. Flown: 145. Comments: Designed for booster applications. Gas generator, pump-fed.